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* Classify a defined hook name against RFC 1157. Mirrors the classifier in
* `generate-component-tasks.mjs` verbatim, with types added.
*/
import { resolveHookPrefix } from './resolveHookPrefix.js';
/** Colour categories recognized by the RFC. */
export type ColorCategory = 'background' | 'foreground' | 'border';
/** Possible outputs of {@link classifyHook}. */
export type HookClassification =
| 'canonical'
| 'canonical-state'
| 'property-first'
| 'invented-state'
| 'invented-modifier'
| 'non-color';
export interface NonColorHook {
isColor: false;
classification: 'non-color';
}
export interface ColorHook {
isColor: true;
classification: Exclude<HookClassification, 'non-color'>;
category: ColorCategory;
element: string | null;
state?: string;
}
export type ClassifiedHook = ColorHook | NonColorHook;
const STATE_TOKENS = new Set([
'hover',
'focus',
'focus-visible',
'active',
'disabled',
'visited',
'selected',
]);
const CARVEOUT_STATE_SUFFIXES = new Set(['hover', 'focus', 'active', 'disabled']);
const CARVEOUT_COLOR_CATEGORIES = new Set<ColorCategory>(['background', 'foreground', 'border']);
const MODIFIER_TOKENS = new Set([
'brand',
'destructive',
'inverse',
'neutral',
'success',
'warning',
'error',
'info',
'outline',
'ghost',
'small',
'medium',
'large',
'x-small',
'xx-small',
'x-large',
'xx-large',
]);
export function classifyHook(hook: string, name: string): ClassifiedHook {
const prefix = `--slds-c-${resolveHookPrefix(name)}-`;
Iif (!hook.startsWith(prefix)) return { isColor: false, classification: 'non-color' };
const rest = hook.slice(prefix.length);
const propertyFirst = /(^|-)(text-color|background-color|border-color)(-|$)/.test(rest);
if (propertyFirst) {
const m = rest.match(/(text-color|background-color|border-color)/);
const cat: ColorCategory =
m?.[1] === 'text-color' ? 'foreground' : m?.[1] === 'background-color' ? 'background' : 'border';
return {
isColor: true,
classification: 'property-first',
category: cat,
element: null,
};
}
const m = rest.match(/^(?:(.+?)-)?color-(background|foreground|border)(?:-(.+))?$/);
if (!m) return { isColor: false, classification: 'non-color' };
const [, elementPart, category, tail] = m;
const cat = category as ColorCategory;
if (tail) {
if (CARVEOUT_STATE_SUFFIXES.has(tail) && CARVEOUT_COLOR_CATEGORIES.has(cat)) {
return {
isColor: true,
classification: 'canonical-state',
category: cat,
element: elementPart ?? null,
state: tail,
};
}
if (STATE_TOKENS.has(tail)) {
return {
isColor: true,
classification: 'invented-state',
category: cat,
element: elementPart ?? null,
};
}
Eif (MODIFIER_TOKENS.has(tail)) {
return {
isColor: true,
classification: 'invented-modifier',
category: cat,
element: elementPart ?? null,
};
}
// Unknown trailing segment — conservative.
return {
isColor: true,
classification: 'invented-state',
category: cat,
element: elementPart ?? null,
};
}
if (elementPart) {
const firstSeg = elementPart.split('-')[0];
Iif (STATE_TOKENS.has(elementPart) || STATE_TOKENS.has(firstSeg)) {
return {
isColor: true,
classification: 'invented-state',
category: cat,
element: elementPart,
};
}
Iif (MODIFIER_TOKENS.has(elementPart) || MODIFIER_TOKENS.has(firstSeg)) {
return {
isColor: true,
classification: 'invented-modifier',
category: cat,
element: elementPart,
};
}
return { isColor: true, classification: 'canonical', category: cat, element: elementPart };
}
return { isColor: true, classification: 'canonical', category: cat, element: null };
}
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